var express = require('express');
var session = require('express-session');
var mongoStore = require('connect-mongo')(session);
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var config = require('config');
var bodyParser = require('body-parser');

var is_login = require('./lib/interceptor_login');

var routes = require('./routes/index');
var admin = require('./routes/admin');
var test = require('./routes/test');
var common = require('./routes/common');
var login = require('./routes/login');

var app = express();
//为了全局访问app,将app加入到global对象上
global.singleton = {app : app};

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');

// uncomment after placing your favicon in /public
//app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
app.use(express.static(path.join(__dirname, 'bower_components')));

app.use(session({
  secret: 'Opfwosnoiwnqwoidjsldfwe', // 建议使用 128 个字符的随机字符串
  resave: true,
  saveUninitialized : false,
  // cookie: { maxAge : config.session.timeout },
  cookie: { maxAge : null },
  store : new mongoStore({
    url : config.mongo_url
  })
}));

app.use(is_login.valid);
app.use(function(req, res, next){
  if(req.session.user){
    app.locals.user = req.session.user;
  }
  next();
});


app.use('/', routes);
app.use('/admin', admin);
app.use('/test', test);
app.use('/common', common);
app.use('/login', login);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  var err = new Error('Not Found');
  err.status = 404;
  next(err);
});

// error handlers

// development error handler
// will print stacktrace
if (app.get('env') === 'development') {
  app.use(function(err, req, res, next) {
    res.status(err.status || 500);
    res.render('error', {
      message: err.message,
      error: err
    });
  });
}

// production error handler
// no stacktraces leaked to user
app.use(function(err, req, res, next) {
  res.status(err.status || 500);
  res.render('error', {
    message: err.message,
    error: {}
  });
});


module.exports = app;
